Moisture measurement gauge for particulates including a transmission line forming part of a resonant circuit
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United States of America Patent
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Mar 14, 1995
Grant Date -
N/A
app pub date -
Dec 28, 1993
filing date -
Dec 28, 1993
priority date (Note) -
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Abstract
A particulate moisture measurement gauge of the type using a resonant electric circuit connected to a diode detector and to an AC signal generator having a frequency near the resonant frequency of the resonant circuit and in which the resonant circuit is electrically coupled to the particulate by a capacitor having the particulate as its dielectric. A probe is formed as a transmission line having a length which is approximately an integral number of one quarter wave lengths long. One end of the transmission line is connected to the circuitry and its opposite, moisture sensing end is immersed in the particulate. Preferably the probe is a rigid, conductive tube with a central rod having a ceramic insulator sealing its moisture sensing end and the circuitry housed in its opposite end.
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